The average height of a group of 8 girls is 132 cm. When Tammy and Anna joined the group, the average height increased by 6 cm. What is Tammy and Anna's total height?
| |
8 girls |
10 girls |
| Number |
8 |
10 |
| Value |
132 |
138 |
| Total value |
1056 |
1380 |
Total number of girls after 2 more girls joined the group
= 8 + 2
= 10
New average height after 2 more girls joined the group
= 132 + 6
= 138 cm
Total height of 8 girls
= 8 x 132
= 1056 cm
Total height of 10 girls
= 10 x 138
= 1380 cm
Total height of Tammy and Anna
= 1380 - 1056
= 324 cm
Answer(s): 324 cm
